ATF and me recently decided that contests shouldn't have the GBA four moves limit. Like with battles, the unique part of URPG is that the four move slots doesn't apply to URPG, thus extending the possibilities of gameplay alot. Thus, contests have no reason actually to still be restricted by the four move slots.
tl;dr: You no longer have to select four moves when you're sending in your Pokemon in a contest. You're free to use any attack that your Pokemon has, taught from whatever methods legally. On-going contests shall stick with the four moves till it's over.